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Test page : <a href="http://jsfiddle.net/WVx97/" rel="ugc">http://jsfiddle.net/WVx97/</a><br />
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<pre><code id="code-20-39610127-1">function myStringIsCorrect( myString ) { // return true or false
     return /^\d\d[a-z][a-z]\d?\d?$/.test(myString)
}</code></pre>
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Test page : http://jsfiddle.net/WVx97/ [http://jsfiddle.net/WVx97/]



function myStringIsCorrect( myString ) { // return true or false
     return /^\d\d[a-z][a-z]\d?\d?$/.test(myString)
}

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<div class="content wysiwyg-content">
I need a javascript to validate a string. It should be max 7 characters long and minimum 4 characters long. The first 2 characters must be numeric. Position 3 and 4 must be alpha, and the remaining positions must be numeric.
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I need a javascript to validate a string. It should be max 7 characters long and minimum 4 characters long. The first 2 characters must be numeric. Position 3 and 4 must be alpha, and the remaining positions must be numeric.

need help with javascript

JavaScript is a dynamic, object-based language commonly used for client-side scripting in web browsers. Recently, server side JavaScript frameworks have also emerged. JavaScript runs on nearly every operating system and  in almost every mainstream web browser.